Windows 11 now ships with a new version of Outlook preinstalled. This version is called the new Outlook for Windows. It replaces the Mail and Calendar apps that came with earlier versions of Windows. Classic Outlook users who install Office or Microsoft 365 will find two Outlook apps on their system. This article explains where the new Outlook is located, what its limits are, and which alternatives exist for enterprise users.
Key Takeaways: New Outlook for Windows 11 — Location, Limits, and Alternatives
- Start Menu > Outlook (new): The new Outlook is pinned to the Start menu by default in Windows 11 23H2 and later.
- No COM add-in support: The new Outlook cannot load third-party COM add-ins such as CRM tools or email encryption plugins.
- Toggle back to classic Outlook: Use the toggle in the new Outlook title bar to switch back to classic Outlook if you have Office installed.
What Is the New Outlook for Windows and Where Is It Installed?
The new Outlook for Windows is a web-based email client built on the same platform as Outlook on the web. It is a progressive web app that runs locally but relies on a constant internet connection. Microsoft began preinstalling this app on Windows 11 devices starting with version 23H2. It replaces the legacy Mail and Calendar apps that were part of Windows 10 and earlier Windows 11 builds.
The new Outlook executable is located at C:\Program Files\WindowsApps\Microsoft.OutlookForWindows_\OutlookForWindows.exe. The exact folder name varies by version number. You can launch the app from the Start menu by searching for Outlook (new). A shortcut is also pinned to the taskbar by default on fresh Windows 11 installations.
If you have Microsoft 365 or Office 2021 installed, classic Outlook remains available. Classic Outlook is installed separately under C:\Program Files\Microsoft Office\root\Office16\OUTLOOK.EXE. Both apps can coexist on the same system without conflict.
How to Verify Which Version You Are Running
Open the Outlook app and go to File > Office Account in classic Outlook. In the new Outlook, click the gear icon in the top-right corner, then select General > About Outlook. The about screen shows the version number and the phrase New Outlook if you are using the preinstalled version.
Limits of the New Outlook for Windows 11
The new Outlook has several limits that affect power users and enterprise environments. These limits are by design because the new Outlook is a replacement for the Mail app, not for classic Outlook in a corporate setting.
No Offline Access to Mail, Calendar, or Contacts
The new Outlook requires an active internet connection to work. It downloads a local cache but does not support full offline composition or calendar editing. If you lose connectivity, you cannot read previously synced messages or create new ones. Classic Outlook with Cached Exchange Mode lets you work offline and sync changes when reconnected.
No Support for COM Add-ins
The new Outlook uses a web-based add-in model only. It cannot load COM add-ins, which are the standard for third-party integrations in classic Outlook. Examples include CRM plugins like Dynamics 365 for Outlook, email encryption tools, and archiving software. If your organization requires COM add-ins, you must use classic Outlook.
No PST File Support
The new Outlook cannot open or create PST files. You cannot import archived email from a PST file or export messages to one. Classic Outlook supports PST files for local archiving and backup. If you rely on PST files for compliance or record keeping, the new Outlook is not usable.
Limited Customization of the Ribbon and Quick Access Toolbar
The new Outlook has a fixed ribbon that cannot be customized. You cannot add or remove buttons from the Quick Access Toolbar. Classic Outlook allows full customization of the ribbon and toolbar through File > Options > Customize Ribbon.
No Support for Shared Mailboxes in Some Configurations
The new Outlook supports shared mailboxes that are added through Exchange Online auto-mapping. However, it does not support manually adding a shared mailbox by entering the SMTP address. If your organization uses shared mailboxes that require manual configuration, you must use classic Outlook.
Alternatives to the New Outlook for Windows 11
If the new Outlook does not meet your needs, you have several alternatives. The right choice depends on your role, your organization’s policies, and the features you require.
Classic Outlook (Microsoft 365 or Office 2021)
Classic Outlook is the full-featured desktop client included with Microsoft 365 subscriptions and Office 2021. It supports offline access, PST files, COM add-ins, shared mailboxes, and full ribbon customization. You can launch classic Outlook from the Start menu by searching for Outlook without the word new. If both apps are installed, use the toggle in the new Outlook title bar to switch to classic Outlook permanently.
Outlook on the Web
Outlook on the web is the browser-based version of Exchange Online or Outlook.com. It offers the same web-based features as the new Outlook without requiring a local app. You can access it at outlook.office.com with your work or personal account. It supports web add-ins but not COM add-ins or PST files.
Microsoft Outlook for Mac
If you use a Mac, Microsoft Outlook for Mac provides a native experience. It supports Exchange Online, IMAP, and POP accounts. It does not support COM add-ins but supports AppleScript and web add-ins. It is included with Microsoft 365 subscriptions.
Third-Party Email Clients
Third-party email clients such as Mozilla Thunderbird, eM Client, and Mailbird can connect to Exchange Online via IMAP or Exchange ActiveSync. These clients support offline access, local archiving, and custom add-ins. They do not support shared mailboxes or full Exchange features like automatic mapping. They are suitable for personal use or small businesses that do not require advanced Exchange functionality.
Common Misunderstandings About the New Outlook
Several misconceptions surround the new Outlook. Clearing these up helps you make an informed decision.
The New Outlook Will Replace Classic Outlook Completely
Microsoft has stated that classic Outlook will remain available for enterprise customers through at least 2029. The new Outlook is not a replacement for classic Outlook in the short term. Organizations can continue using classic Outlook without being forced to migrate.
The New Outlook Is Just a Reskin of the Mail App
The new Outlook shares the same web-based engine as Outlook on the web, not the legacy Mail app. It supports modern authentication, sensitivity labels, and Microsoft Search. It is a different product from the Mail app that shipped with Windows 10.
You Cannot Uninstall the New Outlook
You can uninstall the new Outlook from Windows 11. Go to Settings > Apps > Installed apps, find Outlook (new), and click Uninstall. This removes the app and its shortcuts. Classic Outlook remains unaffected.
New Outlook vs Classic Outlook: Key Differences
| Item | New Outlook (Preinstalled) | Classic Outlook (Office/M365) |
|---|---|---|
| App type | Progressive web app | Native desktop application |
| Offline access | Limited to cached read-only | Full offline compose and sync |
| COM add-in support | None | Full support |
| PST file support | None | Import and export |
| Shared mailboxes | Auto-mapped only | Auto-mapped and manual SMTP |
| Ribbon customization | Not available | Full customization |
| Internet requirement | Required for most operations | Not required with cached mode |
The new Outlook for Windows 11 is a lightweight email client for basic tasks. Classic Outlook remains the tool for power users and enterprise environments. You can run both on the same machine. To switch between them, use the toggle in the new Outlook title bar or launch classic Outlook directly from the Start menu. If you need COM add-ins, PST files, or offline access, stick with classic Outlook. For quick email reading on a secondary device, the new Outlook is sufficient.